import {z} from 'zod'

export type SearchRequest = {query: string, document_id?: string | undefined, table_id?: string | undefined, tags?: Array<string> | undefined, metadata?: {[key: string]: unknown} | undefined, max_depth?: number | undefined, beam_width?: number | undefined, min_confidence?: number | undefined, limit?: number | undefined};

export type CreateApiV1SearchArgs = {body: SearchRequest};

export type CreateApiV1SearchOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const pathNode = z.object({node_id: z.string().optional(), title: z.string().optional(), reasoning: z.string().optional()});

export const searchResult = z.object({node_id: z.string().optional(), document_id: z.string().optional(), path: z.array(pathNode).optional(), content: z.string().optional(), answer: z.string().optional(), confidence: z.number().optional()});

export const searchStats = z.object({nodes_visited: z.number().int().optional(), nodes_pruned: z.number().int().optional(), llm_calls: z.number().int().optional(), total_time_ms: z.number().int().optional()});

export const searchResponse = z.object({results: z.array(searchResult).optional(), stats: searchStats.optional()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Search with LLM-guided tree traversal
 * 
 * POST /v1/search
 */
export const createApiV1Search = async (args: CreateApiV1SearchArgs, options?: CreateApiV1SearchOptions) => {
const {baseUrl = "https://your-reasondb-host", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (ApiKeyAuth !== undefined) headers.set("X-Api-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/search${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(searchResponse, await res.json())
};